A formidable storm, described as a “once-in-five-years” event, is poised to unleash powerful winds reaching 125 km/h, with expected rainfall accumulations around 50mm. Ocean swells could soar up to 8 meters, and there is even a potential for tornadoes.
According to Senior Meteorologist Sarah Scully, intense thunderstorms could produce winds exceeding 125 km/h, create coastal threats, and pose a tornado risk. “This danger is anticipated to persist through Sunday morning, though any tornadoes that might develop will be fleeting and challenging to monitor,” Scully explained.
The affected region might widen over the weekend, as the situation remains dynamic and subject to change, the bureau notes.
“The peak winds are forecasted to occur with a low-pressure system advancing into the southwest by Sunday evening,” added Scully.
“The strongest winds are expected with [a] low-pressure system that will push up into the south-west during Sunday evening,” Scully said.
“Widespread destructive winds are expected to extend about the west coast and pushing into the south-west, where they will continue through until the early hours of Monday morning before that low-pressure system tracks into the bight, with the winds easing across the south-west and instead concentrating through the south coast.”
Residents are being advised by authorities to ensure loose objects are either moved inside or locked down to prevent them becoming airborne.
Western Power have cancelled all of their planned outages over the weekend and put crews on standby for potential weather-related outages from downed power lines.
Hillarys Yacht Club has cancelled its junior sailing event as a precaution.
“Our boatswains have their skipper’s ticket, and they’ll be patrolling the marina and the surrounding clubhouse, just to make sure that everything’s secure and there’s no damage,” Rick Coate from Hillarys Yacht Club told 9News.
But one thing that may not be cancelled despite the wild weather is Sunday’s clash between West Coast and Essendon at Optus Stadium.
“Sometimes people can overplay the bits of rain, these guys are so skilled and talented, its only really heavy torrential rain where strategy changes,” Eagles coach Andrew McQualter said.
The warning for the west coast of Australia comes after the cancellation of a severe storm warning over on the east coast, where heavy rain and storms hammered parts of the country.
The Queensland and NSW coasts, as well as regions further inland, copped a soaking this week, driven by a low-pressure system off the coast.
Falls of up to 80mm were recorded in south-eastern Queensland, and up to 70mm in NSW down to the Central Coast, with the storm warning covering the Mid North Coast, Hunter, North West Slopes and Plains, and Northern Tablelands districts.
Weatherzone’s lightning detector showed 460,000 strikes within 800km of Dalby in southern Queensland in the 24 hours to 9am yesterday. 
By the weekend, the forecasts for both Brisbane and Sydney show sunshine ahead, with temperatures peaking in the low 20s.
But on Saturday, another cold front will approach the south-east of the country.
As a result, showers will increase for South Australia, Victoria, Tasmania and inland parts of New South Wales, with colder southerly winds coming up behind that system.